Moondrop Chu EQ settings for Mac

Last updated: October 2, 2026

Moondrop Chu has 11 published AutoEQ corrections, from 11 measurement rigs, and this page carries every one of them. macOS has no system-wide equalizer of its own, so applying a correction to everything your Mac plays, rather than inside a single player, needs an app that sits on the system audio path.

Who it is for: anyone listening to the Moondrop Chu on a Mac who wants its measured tonal balance pulled toward a neutral target.
What a correction is: a set of equalizer filters that the open-source AutoEQ project computes by comparing a published measurement of the headphone with a target curve.
What this page holds: for every measurement, the curve, its parametric filters, the same filters as copy-paste text, a ten-band version and a one-click EQBase preset.
What it cannot do: it changes frequency response only. It will not make up for a tip that does not seal or for distortion, and it was measured on someone else's pair, not yours.
What you need: any parametric equalizer takes the filters, on any platform. The preset needs EQBase, free on macOS 14.4 or later.

Worth knowing: Eleven rigs measured this earphone, unusual for something this inexpensive, and they agree closely enough that the disagreement only really opens up in the top octave, around 5 dB at 16 kHz. The correction itself is small, averaging about 1 dB across the bands, so if you are expecting a dramatic change from applying it, the Chu was already close to the target.

What the Moondrop Chu correction changes

These figures come from the measurement by oratory1990, the one the picker below opens with. The largest boost is +2.1 dB at bass (62 Hz), and the largest cut is −2.3 dB at top octave (16 kHz). Total swing across the ten bands is 4.4 dB. Averaged over its bands the bass is lifted by 0.8 dB, more than the other two, which is where most of the audible change lands.

The 11 published measurements on this page, from 11 rigs, do not agree with each other, and the size of the disagreement is worth knowing before picking one. They differ most at top octave (16 kHz), where the ten-band figures span 5.5 dB, and least at midrange (1 kHz), where they span 0.7 dB.

The Moondrop Chu corrections, measurement by measurement

Pick a measurement to see its correction curve, its parametric filters, the same filters as copy-paste text in AutoEQ's format (which Equalizer APO and Peace, REW and most desktop parametric equalizers import, and which EQBase's own Expert EQ reads and writes), and EQBase's ten-band version, which is what the downloadable preset applies.

Measurement

Moondrop Chu, measured by oratory1990

Measured by oratory1990. Preamp −2.2 dB. Correction data from the AutoEQ project.

Download the EQBase preset Get EQBase free

Parametric filters, oratory1990
Type	Frequency	Gain	Q
Low shelf	105 Hz	+0.8 dB	0.70
Peak	8.73 kHz	+2.3 dB	2.40
Peak	660 Hz	+1.2 dB	1.92
Peak	165 Hz	−1.2 dB	1.08
Peak	69 Hz	+1.7 dB	1.26
High shelf	10 kHz	−2.5 dB	0.70
Peak	1.47 kHz	−1.1 dB	1.68
Peak	942 Hz	+0.7 dB	2.78
Peak	4.15 kHz	+0.6 dB	3.72
Peak	2.77 kHz	−0.5 dB	3.46

Copy into another equalizer

Preamp: -2.2 dB
Filter 1: ON LSC Fc 105 Hz Gain 0.8 dB Q 0.70
Filter 2: ON PK Fc 8728 Hz Gain 2.3 dB Q 2.40
Filter 3: ON PK Fc 660 Hz Gain 1.2 dB Q 1.92
Filter 4: ON PK Fc 165 Hz Gain -1.2 dB Q 1.08
Filter 5: ON PK Fc 69 Hz Gain 1.7 dB Q 1.26
Filter 6: ON HSC Fc 10000 Hz Gain -2.5 dB Q 0.70
Filter 7: ON PK Fc 1470 Hz Gain -1.1 dB Q 1.68
Filter 8: ON PK Fc 942 Hz Gain 0.7 dB Q 2.78
Filter 9: ON PK Fc 4153 Hz Gain 0.6 dB Q 3.72
Filter 10: ON PK Fc 2772 Hz Gain -0.5 dB Q 3.46

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version, oratory1990
Band	Gain
31 Hz	+0.7 dB
62 Hz	+2.1 dB
125 Hz	−0.4 dB
250 Hz	−0.6 dB
500 Hz	+0.5 dB
1 kHz	+0.6 dB
2 kHz	−0.7 dB
4 kHz	+0.4 dB
8 kHz	+1.6 dB
16 kHz	−2.3 dB
Preamp	−2.2 dB

Moondrop Chu, measured by crinacle

Measured by crinacle. Preamp −3.3 dB. Correction data from the AutoEQ project.

Download the EQBase preset Get EQBase free

Parametric filters, crinacle
Type	Frequency	Gain	Q
Low shelf	105 Hz	+0.3 dB	0.70
Peak	392 Hz	+2.7 dB	1.24
Peak	5.68 kHz	−4.7 dB	1.96
Peak	79 Hz	+3.0 dB	1.74
Peak	1.64 kHz	−1.1 dB	1.71
High shelf	10 kHz	+0.9 dB	0.70
Peak	120 Hz	−1.5 dB	3.65
Peak	99 Hz	+1.6 dB	6.00
Peak	759 Hz	+0.3 dB	2.35
Peak	48 Hz	+0.4 dB	3.00

Copy into another equalizer

Preamp: -3.3 dB
Filter 1: ON LSC Fc 105 Hz Gain 0.3 dB Q 0.70
Filter 2: ON PK Fc 392 Hz Gain 2.7 dB Q 1.24
Filter 3: ON PK Fc 5680 Hz Gain -4.7 dB Q 1.96
Filter 4: ON PK Fc 79 Hz Gain 3.0 dB Q 1.74
Filter 5: ON PK Fc 1642 Hz Gain -1.1 dB Q 1.71
Filter 6: ON HSC Fc 10000 Hz Gain 0.9 dB Q 0.70
Filter 7: ON PK Fc 120 Hz Gain -1.5 dB Q 3.65
Filter 8: ON PK Fc 99 Hz Gain 1.6 dB Q 6.00
Filter 9: ON PK Fc 759 Hz Gain 0.3 dB Q 2.35
Filter 10: ON PK Fc 48 Hz Gain 0.4 dB Q 3.00

Ten-band version, crinacle
Band	Gain
31 Hz	+0.2 dB
62 Hz	+2.2 dB
125 Hz	−0.7 dB
250 Hz	+1.0 dB
500 Hz	+1.9 dB
1 kHz	−0.1 dB
2 kHz	−0.6 dB
4 kHz	−1.3 dB
8 kHz	−1.3 dB
16 kHz	+0.9 dB
Preamp	−3.3 dB

Moondrop Chu, measured by Super Review

Measured by Super Review. Preamp −2.5 dB. Correction data from the AutoEQ project.

Download the EQBase preset Get EQBase free

Parametric filters, Super Review
Type	Frequency	Gain	Q
Low shelf	105 Hz	+2.4 dB	0.70
Peak	173 Hz	−1.2 dB	1.20
Peak	109 Hz	+1.2 dB	0.99
Peak	720 Hz	+1.2 dB	1.57
Peak	149 Hz	−0.8 dB	1.07
High shelf	10 kHz	−3.3 dB	0.70
Peak	2.94 kHz	+0.7 dB	1.10
Peak	1.47 kHz	−0.8 dB	2.31
Peak	8.48 kHz	+1.6 dB	4.76
Peak	6.74 kHz	−0.8 dB	6.00

Copy into another equalizer

Preamp: -2.5 dB
Filter 1: ON LSC Fc 105 Hz Gain 2.4 dB Q 0.70
Filter 2: ON PK Fc 173 Hz Gain -1.2 dB Q 1.20
Filter 3: ON PK Fc 109 Hz Gain 1.2 dB Q 0.99
Filter 4: ON PK Fc 720 Hz Gain 1.2 dB Q 1.57
Filter 5: ON PK Fc 149 Hz Gain -0.8 dB Q 1.07
Filter 6: ON HSC Fc 10000 Hz Gain -3.3 dB Q 0.70
Filter 7: ON PK Fc 2939 Hz Gain 0.7 dB Q 1.10
Filter 8: ON PK Fc 1474 Hz Gain -0.8 dB Q 2.31
Filter 9: ON PK Fc 8477 Hz Gain 1.6 dB Q 4.76
Filter 10: ON PK Fc 6744 Hz Gain -0.8 dB Q 6.00

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version, Super Review
Band	Gain
31 Hz	+2.1 dB
62 Hz	+2.0 dB
125 Hz	+0.2 dB
250 Hz	−0.8 dB
500 Hz	+0.4 dB
1 kHz	+0.4 dB
2 kHz	+0.1 dB
4 kHz	+0.3 dB
8 kHz	+0.7 dB
16 kHz	−3.0 dB
Preamp	−2.5 dB

Moondrop Chu, measured by HypetheSonics

Measured by HypetheSonics. Preamp −2.2 dB. Correction data from the AutoEQ project.

Download the EQBase preset Get EQBase free

Parametric filters, HypetheSonics
Type	Frequency	Gain	Q
Low shelf	105 Hz	+0.8 dB	0.70
Peak	66 Hz	+1.6 dB	1.03
Peak	1.45 kHz	−1.3 dB	1.18
Peak	713 Hz	+1.3 dB	1.04
Peak	180 Hz	−0.8 dB	1.30
High shelf	10 kHz	−6.0 dB	0.70
Peak	9.43 kHz	+2.0 dB	0.97
Peak	5.12 kHz	−1.4 dB	3.91
Peak	6.61 kHz	+1.4 dB	3.07
Peak	2.56 kHz	−0.2 dB	2.87

Copy into another equalizer

Preamp: -2.2 dB
Filter 1: ON LSC Fc 105 Hz Gain 0.8 dB Q 0.70
Filter 2: ON PK Fc 66 Hz Gain 1.6 dB Q 1.03
Filter 3: ON PK Fc 1446 Hz Gain -1.3 dB Q 1.18
Filter 4: ON PK Fc 713 Hz Gain 1.3 dB Q 1.04
Filter 5: ON PK Fc 180 Hz Gain -0.8 dB Q 1.30
Filter 6: ON HSC Fc 10000 Hz Gain -6.0 dB Q 0.70
Filter 7: ON PK Fc 9434 Hz Gain 2.0 dB Q 0.97
Filter 8: ON PK Fc 5119 Hz Gain -1.4 dB Q 3.91
Filter 9: ON PK Fc 6608 Hz Gain 1.4 dB Q 3.07
Filter 10: ON PK Fc 2559 Hz Gain -0.2 dB Q 2.87

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version, HypetheSonics
Band	Gain
31 Hz	+0.8 dB
62 Hz	+2.1 dB
125 Hz	+0.1 dB
250 Hz	−0.4 dB
500 Hz	+0.7 dB
1 kHz	+0.1 dB
2 kHz	−0.7 dB
4 kHz	+0.0 dB
8 kHz	+1.4 dB
16 kHz	−4.5 dB
Preamp	−2.2 dB

Moondrop Chu, measured by Harpo

Measured by Harpo. Preamp −1.8 dB. Correction data from the AutoEQ project.

Download the EQBase preset Get EQBase free

Parametric filters, Harpo
Type	Frequency	Gain	Q
Low shelf	105 Hz	+0.7 dB	0.70
Peak	184 Hz	−0.9 dB	0.94
Peak	641 Hz	+1.0 dB	2.04
Peak	66 Hz	+1.3 dB	0.91
Peak	7.28 kHz	+1.1 dB	2.14
High shelf	10 kHz	−3.4 dB	0.70
Peak	1.39 kHz	−0.8 dB	1.90
Peak	8.73 kHz	+1.5 dB	3.82
Peak	3.8 kHz	+0.5 dB	3.04
Peak	876 Hz	+0.5 dB	2.93

Copy into another equalizer

Preamp: -1.8 dB
Filter 1: ON LSC Fc 105 Hz Gain 0.7 dB Q 0.70
Filter 2: ON PK Fc 184 Hz Gain -0.9 dB Q 0.94
Filter 3: ON PK Fc 641 Hz Gain 1.0 dB Q 2.04
Filter 4: ON PK Fc 66 Hz Gain 1.3 dB Q 0.91
Filter 5: ON PK Fc 7276 Hz Gain 1.1 dB Q 2.14
Filter 6: ON HSC Fc 10000 Hz Gain -3.4 dB Q 0.70
Filter 7: ON PK Fc 1388 Hz Gain -0.8 dB Q 1.90
Filter 8: ON PK Fc 8732 Hz Gain 1.5 dB Q 3.82
Filter 9: ON PK Fc 3801 Hz Gain 0.5 dB Q 3.04
Filter 10: ON PK Fc 876 Hz Gain 0.5 dB Q 2.93

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version, Harpo
Band	Gain
31 Hz	+0.8 dB
62 Hz	+1.7 dB
125 Hz	−0.0 dB
250 Hz	−0.6 dB
500 Hz	+0.4 dB
1 kHz	+0.2 dB
2 kHz	−0.3 dB
4 kHz	+0.4 dB
8 kHz	+1.6 dB
16 kHz	−3.1 dB
Preamp	−1.8 dB

Moondrop Chu, measured by Filk

Measured by Filk. Preamp −2.9 dB. Correction data from the AutoEQ project.

Download the EQBase preset Get EQBase free

Parametric filters, Filk
Type	Frequency	Gain	Q
Low shelf	105 Hz	+3.0 dB	0.70
Peak	5.23 kHz	−1.2 dB	1.49
Peak	8.21 kHz	+2.0 dB	3.09
Peak	743 Hz	+0.8 dB	1.53
Peak	1.29 kHz	−0.9 dB	2.00
High shelf	10 kHz	+0.1 dB	0.70
Peak	234 Hz	−0.6 dB	1.57
Peak	41 Hz	−0.3 dB	2.02
Peak	428 Hz	+0.2 dB	1.20
Peak	72 Hz	+0.2 dB	2.46

Copy into another equalizer

Preamp: -2.9 dB
Filter 1: ON LSC Fc 105 Hz Gain 3.0 dB Q 0.70
Filter 2: ON PK Fc 5231 Hz Gain -1.2 dB Q 1.49
Filter 3: ON PK Fc 8215 Hz Gain 2.0 dB Q 3.09
Filter 4: ON PK Fc 743 Hz Gain 0.8 dB Q 1.53
Filter 5: ON PK Fc 1291 Hz Gain -0.9 dB Q 2.00
Filter 6: ON HSC Fc 10000 Hz Gain 0.1 dB Q 0.70
Filter 7: ON PK Fc 234 Hz Gain -0.6 dB Q 1.57
Filter 8: ON PK Fc 41 Hz Gain -0.3 dB Q 2.02
Filter 9: ON PK Fc 428 Hz Gain 0.2 dB Q 1.20
Filter 10: ON PK Fc 72 Hz Gain 0.2 dB Q 2.46

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version, Filk
Band	Gain
31 Hz	+2.4 dB
62 Hz	+2.2 dB
125 Hz	+0.6 dB
250 Hz	−0.7 dB
500 Hz	+0.5 dB
1 kHz	−0.0 dB
2 kHz	−0.1 dB
4 kHz	−0.9 dB
8 kHz	+1.8 dB
16 kHz	−0.2 dB
Preamp	−2.9 dB

Moondrop Chu, measured by ToneDeafMonk

Measured by ToneDeafMonk. Preamp −1.9 dB. Correction data from the AutoEQ project.

Download the EQBase preset Get EQBase free

Parametric filters, ToneDeafMonk
Type	Frequency	Gain	Q
Low shelf	105 Hz	−0.3 dB	0.70
Peak	188 Hz	−1.4 dB	0.90
Peak	2.4 kHz	+1.9 dB	2.49
Peak	65 Hz	+1.7 dB	1.05
Peak	675 Hz	+0.8 dB	1.75
High shelf	10 kHz	−4.8 dB	0.70
Peak	6.73 kHz	+2.1 dB	2.05
Peak	4.36 kHz	−1.2 dB	2.47
Peak	1.27 kHz	−0.4 dB	3.17
Peak	3.04 kHz	+0.4 dB	4.17

Copy into another equalizer

Preamp: -1.9 dB
Filter 1: ON LSC Fc 105 Hz Gain -0.3 dB Q 0.70
Filter 2: ON PK Fc 188 Hz Gain -1.4 dB Q 0.90
Filter 3: ON PK Fc 2404 Hz Gain 1.9 dB Q 2.49
Filter 4: ON PK Fc 65 Hz Gain 1.7 dB Q 1.05
Filter 5: ON PK Fc 675 Hz Gain 0.8 dB Q 1.75
Filter 6: ON HSC Fc 10000 Hz Gain -4.8 dB Q 0.70
Filter 7: ON PK Fc 6733 Hz Gain 2.1 dB Q 2.05
Filter 8: ON PK Fc 4364 Hz Gain -1.2 dB Q 2.47
Filter 9: ON PK Fc 1271 Hz Gain -0.4 dB Q 3.17
Filter 10: ON PK Fc 3044 Hz Gain 0.4 dB Q 4.17

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version, ToneDeafMonk
Band	Gain
31 Hz	−0.1 dB
62 Hz	+1.4 dB
125 Hz	−0.5 dB
250 Hz	−1.0 dB
500 Hz	+0.3 dB
1 kHz	−0.0 dB
2 kHz	+1.2 dB
4 kHz	−0.7 dB
8 kHz	+0.9 dB
16 kHz	−4.2 dB
Preamp	−1.9 dB

Moondrop Chu, measured by Regan Cipher

Measured by Regan Cipher. Preamp −4.3 dB. Correction data from the AutoEQ project.

Download the EQBase preset Get EQBase free

Parametric filters, Regan Cipher
Type	Frequency	Gain	Q
Low shelf	105 Hz	+8.3 dB	0.70
Peak	46 Hz	−6.0 dB	0.38
Peak	6.32 kHz	+3.3 dB	1.54
Peak	669 Hz	+2.6 dB	0.88
Peak	849 Hz	−1.5 dB	0.29
High shelf	10 kHz	−3.6 dB	0.70
Peak	9.3 kHz	+1.6 dB	2.37
Peak	1.31 kHz	−0.6 dB	5.99
Peak	903 Hz	+0.3 dB	3.83
Peak	2.11 kHz	+0.2 dB	3.95

Copy into another equalizer

Preamp: -4.3 dB
Filter 1: ON LSC Fc 105 Hz Gain 8.3 dB Q 0.70
Filter 2: ON PK Fc 46 Hz Gain -6.0 dB Q 0.38
Filter 3: ON PK Fc 6317 Hz Gain 3.3 dB Q 1.54
Filter 4: ON PK Fc 669 Hz Gain 2.6 dB Q 0.88
Filter 5: ON PK Fc 849 Hz Gain -1.5 dB Q 0.29
Filter 6: ON HSC Fc 10000 Hz Gain -3.6 dB Q 0.70
Filter 7: ON PK Fc 9302 Hz Gain 1.6 dB Q 2.37
Filter 8: ON PK Fc 1306 Hz Gain -0.6 dB Q 5.99
Filter 9: ON PK Fc 903 Hz Gain 0.3 dB Q 3.83
Filter 10: ON PK Fc 2106 Hz Gain 0.2 dB Q 3.95

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version, Regan Cipher
Band	Gain
31 Hz	+2.6 dB
62 Hz	+1.3 dB
125 Hz	−0.8 dB
250 Hz	−1.3 dB
500 Hz	+0.6 dB
1 kHz	+0.3 dB
2 kHz	−0.6 dB
4 kHz	+0.3 dB
8 kHz	+2.6 dB
16 kHz	−3.2 dB
Preamp	−4.3 dB

Moondrop Chu, measured by freeryder05

Measured by freeryder05. Preamp −2.2 dB. Correction data from the AutoEQ project.

Download the EQBase preset Get EQBase free

Parametric filters, freeryder05
Type	Frequency	Gain	Q
Low shelf	105 Hz	+1.1 dB	0.70
Peak	664 Hz	+1.4 dB	1.46
Peak	193 Hz	−1.1 dB	1.83
Peak	63 Hz	+1.3 dB	1.33
Peak	6.31 kHz	−0.8 dB	2.86
High shelf	10 kHz	−5.2 dB	0.70
Peak	8.64 kHz	+2.5 dB	3.57
Peak	1.34 kHz	−0.6 dB	2.34
Peak	2.79 kHz	+0.4 dB	1.14
Peak	894 Hz	+0.3 dB	3.47

Copy into another equalizer

Preamp: -2.2 dB
Filter 1: ON LSC Fc 105 Hz Gain 1.1 dB Q 0.70
Filter 2: ON PK Fc 664 Hz Gain 1.4 dB Q 1.46
Filter 3: ON PK Fc 193 Hz Gain -1.1 dB Q 1.83
Filter 4: ON PK Fc 63 Hz Gain 1.3 dB Q 1.33
Filter 5: ON PK Fc 6312 Hz Gain -0.8 dB Q 2.86
Filter 6: ON HSC Fc 10000 Hz Gain -5.2 dB Q 0.70
Filter 7: ON PK Fc 8637 Hz Gain 2.5 dB Q 3.57
Filter 8: ON PK Fc 1339 Hz Gain -0.6 dB Q 2.34
Filter 9: ON PK Fc 2790 Hz Gain 0.4 dB Q 1.14
Filter 10: ON PK Fc 894 Hz Gain 0.3 dB Q 3.47

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version, freeryder05
Band	Gain
31 Hz	+1.0 dB
62 Hz	+2.1 dB
125 Hz	+0.0 dB
250 Hz	−0.6 dB
500 Hz	+0.8 dB
1 kHz	+0.4 dB
2 kHz	+0.1 dB
4 kHz	+0.0 dB
8 kHz	+1.1 dB
16 kHz	−4.6 dB
Preamp	−2.2 dB

Moondrop Chu, measured by kr0mka

Measured by kr0mka. Preamp −2.1 dB. Correction data from the AutoEQ project.

Download the EQBase preset Get EQBase free

Parametric filters, kr0mka
Type	Frequency	Gain	Q
Low shelf	105 Hz	+0.6 dB	0.70
Peak	91 Hz	+2.0 dB	0.58
Peak	140 Hz	−2.0 dB	2.30
Peak	670 Hz	+1.1 dB	1.98
Peak	218 Hz	−1.2 dB	1.42
High shelf	10 kHz	−2.3 dB	0.70
Peak	8.62 kHz	+2.4 dB	3.80
Peak	1.39 kHz	−0.9 dB	1.75
Peak	910 Hz	+0.6 dB	3.22
Peak	4.22 kHz	+0.5 dB	3.46

Copy into another equalizer

Preamp: -2.1 dB
Filter 1: ON LSC Fc 105 Hz Gain 0.6 dB Q 0.70
Filter 2: ON PK Fc 91 Hz Gain 2.0 dB Q 0.58
Filter 3: ON PK Fc 140 Hz Gain -2.0 dB Q 2.30
Filter 4: ON PK Fc 670 Hz Gain 1.1 dB Q 1.98
Filter 5: ON PK Fc 218 Hz Gain -1.2 dB Q 1.42
Filter 6: ON HSC Fc 10000 Hz Gain -2.3 dB Q 0.70
Filter 7: ON PK Fc 8618 Hz Gain 2.4 dB Q 3.80
Filter 8: ON PK Fc 1390 Hz Gain -0.9 dB Q 1.75
Filter 9: ON PK Fc 910 Hz Gain 0.6 dB Q 3.22
Filter 10: ON PK Fc 4225 Hz Gain 0.5 dB Q 3.46

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version, kr0mka
Band	Gain
31 Hz	+0.8 dB
62 Hz	+1.9 dB
125 Hz	−0.2 dB
250 Hz	−0.7 dB
500 Hz	+0.5 dB
1 kHz	+0.4 dB
2 kHz	−0.4 dB
4 kHz	+0.3 dB
8 kHz	+1.6 dB
16 kHz	−2.2 dB
Preamp	−2.1 dB

Moondrop Chu, measured by Ted's Squig Hoard

Measured by Ted's Squig Hoard. Preamp −2.3 dB. Correction data from the AutoEQ project.

Download the EQBase preset Get EQBase free

Parametric filters, Ted's Squig Hoard
Type	Frequency	Gain	Q
Low shelf	105 Hz	+0.7 dB	0.70
Peak	153 Hz	−1.2 dB	1.12
Peak	69 Hz	+1.6 dB	0.66
Peak	186 Hz	−0.9 dB	1.07
Peak	97 Hz	+0.7 dB	0.84
High shelf	10 kHz	−3.4 dB	0.70
Peak	8.48 kHz	+2.3 dB	1.56
Peak	2.24 kHz	+1.0 dB	2.58
Peak	768 Hz	+0.8 dB	1.92
Peak	1.3 kHz	−0.9 dB	2.02

Copy into another equalizer

Preamp: -2.3 dB
Filter 1: ON LSC Fc 105 Hz Gain 0.7 dB Q 0.70
Filter 2: ON PK Fc 153 Hz Gain -1.2 dB Q 1.12
Filter 3: ON PK Fc 69 Hz Gain 1.6 dB Q 0.66
Filter 4: ON PK Fc 186 Hz Gain -0.9 dB Q 1.07
Filter 5: ON PK Fc 97 Hz Gain 0.7 dB Q 0.84
Filter 6: ON HSC Fc 10000 Hz Gain -3.4 dB Q 0.70
Filter 7: ON PK Fc 8480 Hz Gain 2.3 dB Q 1.56
Filter 8: ON PK Fc 2241 Hz Gain 1.0 dB Q 2.58
Filter 9: ON PK Fc 768 Hz Gain 0.8 dB Q 1.92
Filter 10: ON PK Fc 1296 Hz Gain -0.9 dB Q 2.02

AutoEQ also publishes a 127-point graphic curve, a fixed-band version, the raw measurement and the response graph for this measurement: see the source files.

Ten-band version, Ted's Squig Hoard
Band	Gain
31 Hz	+1.0 dB
62 Hz	+2.2 dB
125 Hz	−0.0 dB
250 Hz	−0.8 dB
500 Hz	+0.2 dB
1 kHz	−0.1 dB
2 kHz	+0.6 dB
4 kHz	−0.0 dB
8 kHz	+1.8 dB
16 kHz	−2.9 dB
Preamp	−2.3 dB

Ten-band or parametric EQ for the Moondrop Chu?

A parametric equalizer lets every filter take any frequency, gain and width, where width is written as Q and a higher Q means a narrower filter, so it can reproduce AutoEQ's filters exactly. A ten-band graphic equalizer has ten fixed bands an octave apart, from 31 Hz to 16 kHz, all the same width, so it can only approximate them. EQBase's ten-band version sets those ten gains to match the parametric curve at the band centers, allowing for how the bands overlap, rather than reading the curve off at each center.

On oratory1990's measurement, the ten-band version stays within 0.9 dB of the parametric curve between 40 Hz and 10 kHz. Across all 8,666 corrections in EQBase's catalog the median for that range is 3.3 dB, which makes the Moondrop Chu an easier fit for ten bands than most. The largest of those gaps sits around 1.4 kHz, between the 1 kHz and 2 kHz bands, where the ten-band curve can only bridge from one center to the next.

Use the parametric filters if your equalizer accepts them: they are the correction exactly as published. The ten-band version is for equalizers with fixed sliders, EQBase's free tier among them, and it is what the downloadable preset applies. On EQBase Pro, applying the Moondrop Chu from the Headphones pane uses the parametric filters directly, and the preset carries them as well, one switch to Expert EQ away. AutoEQ publishes its own ten-band file on the same grid, fitted to the raw measurement rather than to these filters, so the two agree closely through the midrange and can differ at the extremes.

How to use the Moondrop Chu correction on a Mac

To use the Moondrop Chu correction on a Mac, apply it with an equalizer that runs on system audio, so it reaches every app at once. In EQBase the fastest route skips this page: open the Headphones pane, search for the Moondrop Chu, which is in the built-in catalog of 6,033 models, and click the measurement you want. The preset above does the same from a file, for anyone who wants to see the numbers first or a specific measurement rather than the default one.

Either way the free tier carries it with no time limit. The Moondrop Chu preset above sets the ten-band curve, which is what the free tier applies, so nothing on this page is behind a purchase.

The Moondrop Chu is an in-ear monitor, and its bass depends far more on the seal than on anything in this correction. A tip that does not seal loses the low bass outright, and no amount of boost puts it back. If the bottom end still sounds missing after applying this, change tips and re-seat them before deciding the curve is wrong.

Something this small is sensitive enough that a Mac's own output drives it without help, so the correction is doing all of the work here rather than sharing it with an amplifier.

Common questions about Moondrop Chu EQ

Do these EQ settings work on any Mac app?

Yes, if the equalizer runs on system audio rather than inside one player. EQBase processes everything the Mac plays, so the same correction applies to Spotify, Safari, YouTube, games and calls. The Music app's own equalizer only affects Music.

Where do the Moondrop Chu numbers come from?

From 11 published AutoEQ measurements of the Moondrop Chu, made by oratory1990, crinacle, Super Review, HypetheSonics, Harpo, Filk, ToneDeafMonk, Regan Cipher, freeryder05, kr0mka and Ted's Squig Hoard. Each one is a real frequency-response measurement compared against a target curve, and each produces its own set of filters. They are all on this page rather than averaged together, because a measurement belongs to the person who made it.

Why is the Moondrop Chu preamp negative?

The Moondrop Chu correction needs −2.2 dB of headroom on its default measurement, so the preset pulls the signal down by that much before the boosts are applied. Boosting a signal that is already near full scale would clip it, and the negative preamp is what buys the room. Skip it and loud passages distort. That is a small figure, meaning this correction is mostly cuts rather than boosts, so it costs very little loudness.

Can I use these filters in a different equalizer?

Yes. The filter table is a standard parametric list: type, frequency, gain and Q. Any parametric equalizer that accepts those four values per band will take them, on any platform. The one-click preset is only a shortcut for EQBase users.

Other headphones with published corrections

Truthear x Crinacle Zero RED EQ settings for Mac, 22 published measurements
7Hz Salnotes Zero EQ settings for Mac, 10 published measurements
Apple AirPods Pro 2 EQ settings for Mac, 18 published measurements
Sennheiser HD 600 EQ settings for Mac, 13 published measurements
Beyerdynamic DT 770 Pro EQ settings for Mac, 11 published measurements

Credits

Correction data from the AutoEQ project by Jaakko Pasanen, used under the MIT licence. The measurements themselves are the work of the people credited on each curve above. EQBase ships the same catalog in the app, with the same attribution.

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